Silver-loaded chitosan/polyvinyl alcohol micro-ribbon and preparation method and application thereof

A technology of polyvinyl alcohol and polyvinyl alcohol solution, which is applied in the directions of filament/thread forming, textile and papermaking, fiber processing, etc., to achieve the effects of simple preparation process, high specific surface area and uniform distribution

Active Publication Date: 2017-05-31
JIANGSU YITONG BIOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, silver-loaded chitosan / polyvinyl alcohol microribbons are directly prepared by electrospinning technology, but there is no relevant report

Method used

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  • Silver-loaded chitosan/polyvinyl alcohol micro-ribbon and preparation method and application thereof
  • Silver-loaded chitosan/polyvinyl alcohol micro-ribbon and preparation method and application thereof
  • Silver-loaded chitosan/polyvinyl alcohol micro-ribbon and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh 10 g of polyvinyl alcohol and dissolve it in 90 g of water, heat and dissolve with magnetic stirring, and prepare 100 g of polyvinyl alcohol solution with a mass fraction of 10%. Weigh 0.2g chitosan and dissolve it in lactic acid to prepare 10g mass fraction of 2% chitosan lactic acid solution. After mixing the above polyvinyl alcohol and chitosan solution at a mass ratio of 70:30, add silver nitrate with 2% of the total mass of polyvinyl alcohol and chitosan, stir in the dark for 48 hours, and prepare spinning solution. Spinning was performed using an electrospinning device with a voltage of 20kV, a syringe pump at a speed of 2.26mL / h, and aluminum foil was used for receiving, and the receiving distance was 15cm. That is, the silver-loaded chitosan / polyvinyl alcohol micro-belts were prepared.

[0035] With the increase of stirring time, the obtained spinning solution has the UV absorption intensity as follows: figure 1 As shown, with the increase of stirring ti...

Embodiment 2

[0037] The mass concentration of the polyvinyl alcohol solution was expanded to 20%, and the other reagents, dosages and process conditions were unchanged, and Example 1 was repeated to obtain the silver-loaded chitosan / polyvinyl alcohol microbelts. The XRD of the prepared micron belt is as follows figure 2As shown, about 20° is the chitosan amorphous peak, and the indexed peak is the peak of elemental silver, which shows that the silver in the micron belt is elemental silver. The scanning and transmission photos of the substrate before and after silver loading are as follows: image 3 , 4 As shown, the prepared composite film is a ribbon-shaped fiber with a diameter of 0.6-1 μm, and the surface of the ribbon-shaped fiber is uniformly covered with silver nanoparticles after silver loading, with a particle diameter of 5-60 nm.

Embodiment 3

[0039] The mass concentration of the chitosan solution was enlarged to 8%, and the other reagents, dosages and process conditions were unchanged, and Example 1 was repeated to obtain the silver-loaded chitosan / polyvinyl alcohol microbelts.

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Abstract

The invention relates to a silver-loaded chitosan/polyvinyl alcohol micro-ribbon and a preparation method and application thereof. The micro-ribbon is a chitosan/polyvinyl alcohol ribbon-shaped composite fiber film on which silver nanoparticles are uniformly distributed; the micro-ribbon has a diameter of 0.3 to 2mum; the silver nanoparticles have a particle size of 5 to 60nm. After polyvinyl alcohol solution and lactic acid solution of chitosan are mixed, ethyl alcohol is added; after the mixture is uniformly stirred, silver nitrate is added; stirring is carried out in a mode of keeping out of the sun for 40 to 50h to prepare spinning solution; then electrostatic spinning is carried out to obtain the silver-loaded chitosan/polyvinyl alcohol micro-ribbon. The micro-ribbon disclosed by the invention has the advantages of one-dimensional and two-dimensional nano materials, has a higher specific surface area, porosity and water absorption; the nano particles are attached or embedded into the micro-ribbon; phenomena of falling, aggregation and the like of nano silver are effectively reduced; the formed nano silver is more uniformly distributed in the micro ribbon; a fatality rate of the micro-ribbon for escherichia coli is 100%.

Description

technical field [0001] The invention relates to the field of composite nanofiber materials, in particular to a silver-loaded chitosan / polyvinyl alcohol microbelt with antibacterial properties, a preparation method and application thereof. Background technique [0002] The noble metal silver has been used as a highly effective antimicrobial material due to its unique optoelectronic properties, high chemical stability, and catalytic activity. Nanomaterials have a large specific surface area and high catalytic activity, and have better catalytic and bactericidal properties than their bulk materials. In recent years, people have prepared nano-scale silver particles by various means, and this nano-silver has more excellent antibacterial properties. However, due to the small size of nano-silver, it is easy to lose when used alone. Therefore, it is generally loaded on a carrier material in practical application to exert its excellent bactericidal ability. Loading nano-silver into...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D01D5/00
CPCD01D5/0015D04H1/728
Inventor 卢启芳王东赵晴刘莉邓亚亚
Owner JIANGSU YITONG BIOTECHNOLOGY CO LTD
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